I somehow managed to use C++/CLI in Unity by compiling it with /clr:safe. Now I want to learn how can I use Coroutine in C++/CLI. There is no keyword in either C++ or C++/CLI like yield and without yield I cannot make it run. So how am I supposed do this? If anyone knows how to do this, please help. I searched it on Google and found nothing but only for IEnumerable<T>.
Why do you want to use C++ CLI? Even Microsoft does not really recommend to use it as an actual development language. It’s mainly a bridging language between native C++ and the .NET world.
Though to answer your question specifically: Coroutines in Unity are build completely on the IEnumerator interface of the .NET framework. The yield keyword in C# is a pure compiler feature that does all the heavy lifting for you which makes creating coroutines / statemachine very easy. C++ / CLI does not have such a compiler feature. You could still create your own IEnumerator and run it as “coroutine”, but it’s pretty pointless to manually construct a statemachine in order to have it run as a “coroutine” in unity.
You may want to read my answer to this question over here where I explained in detail how coroutines work in Unity and more importantly what the yield keyword actually does for you.
You may have your reasons to use C++ / CLi, however I would highly recommend to stay away from it if possible. It’s not C++ and not a proper .NET language either. It essentially brings all bad parts from both worlds together and has a lot of additional syntax that’s neither C++ nor C# just in order to make the language support the .NET features.